<!-- local.html -->
<!DOCTYPE html>
<html>
<body>
<h1>Hello World</h1>
<div id="msg">...</div>
<button onclick="getInputStr()">获取传入内容</button>
</body>
<script>
    function getMessageToArkTS() {
        return "今天天气很好";
    }

      function getInputStr() {
      let str = u7RetStr.retStr();
      document.getElementById("msg").innerText = str;
  }
</script>
</html>